At 2:20 a.m., police say, a man walked into Union Memorial Hospital with a gunshot wound to his right leg. The man told police that he was in the 1400 block of Guilford Avenue when an unknown suspect approached him while he was seated in his vehicle, fired one shot and fled.

Central District detectives are investigating and have no suspects.

The shooting was the only reported incident of violent crime after Tuesday's "National Night Out," which was celebrated across the nation and city with parades and barbecues as a way to strengthen community bonds and empower residents to take back their streets from drugs and crime. The mayor, council members and the police commissioner attended several events across Baltimore.

July has seen more than 40 homicides so far, making it the second month in 2015 that homicides in Baltimore city have risen above 40. Homicides are also up across the board since 2014. See our homicide map here for a deeper dive into the data. Data accurate as of July 29, 2015 Months with more...

In 2015, Baltimore has seen two months with more than 40 homicides in a single-year period since the 1970s when the city's population was around 300,000 more residents, or during the 1990s when the number of homicides peaked at 353 murders.

May has seen 42 homicides so far, making it Baltimore's deadliest month since 1972. Shootings this month have more than doubled compared to May 2014. Meanwhile, arrests have plummeted since April's unrest in Baltimore, with only 1,177 people arrested so far in May compared to 3,801 in the same...